Controlled Vocabulary & Thesaurus Design Hierarchies & Taxonomies
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Term Relationships Term equivalency Groups equivalent terms Establishes USE/UF relationship USE Preferred term UF Synonym (non-preferred term) Term hierarchy Groups like terms under a broader term Establishes BT/NT relationship BT Broader term NT Narrower term
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Mapping Term Relationships BT (Broader Term) NT (Narrower Term) USE, UF (Use, Use For) Term
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Hierarchical Relationships Generic BTGInstance BTIWhole/Part BTP BTP Heads NT Skulls BTG Bones NT Skulls BTI Movies NT The Skulls x
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop BTG BonesBTP Heads NT Skulls NT Femurs NT Brains NT Teeth NT Vertebrae Polyhierarchies Where the same term fits under more than one broader term
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop AAT’s “graffiti” Polyhierarchy
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Polyhierarchy or Qualifiers BT4 Materials BT3 Inorganic materials BT2 Rock BT1 Metamorphic rock Jade NT Jadeite NT Old jade Jade (materials) BT4 Colors BT3 Green BT2 Bluish green BT1 Light bluish green NT Jade Jade (colors)
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Facet Analysis & Facets The division of terms into categories Using one principle of division at a time To produce groups which are Homogeneous Mutually exclusive The facets comprise a single thesaurus
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Facet Example: AAT
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Exercise 3: Hierarchy! In your groups… Take the terms from Exercise 2 Group like terms Develop or find Broader terms to describe the groupings
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Exercise 3: Discussion What hierarchies did you come up with? Did anyone attempt Polyhierarchies or Qualifiers? How did this work? Was it harder than you expected? Was it easier than you expected?
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Continuum of Vocabulary Control Less Complexity More List Synonym Ring Taxonomy Ontology Thesaurus Ambiguity Control Synonym Control Ambiguity Control Synonym Control Hierarchical Relationships Ambiguity Control Synonym Control Hierarchical Relationships Associative Relationships
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomies & Ontologies Taxonomies Hierarchical organizations of terms Controlled for synonyms Prevalent in business and web topic organization Intended to reflect real world organization Ontologies Hierarchical organization of terms Not necessarily controlled for synonyms Prevalent in computer science and academia Intended to reflect disciplinary domain
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 1a
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 1b
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 1c
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 2a
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 2b
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 3a
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 3b
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 3c
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 3d
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 3e
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy Example 3f
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Taxonomy & Ontology Discussion What are the potential benefits? What are the potential drawbacks?
Developed by the Association of Library Collections & Technical Services and Library of Congress’s Cataloger’s Learning Workshop Wrapping Up Day 1 The role of Controlled Vocabulary tools The spectrum of Controlled Vocabulary tools Term selection and Lists Term refinement and Synonym Rings Organizing terms with hierarchy, in Taxonomies and Ontologies